Fluid cylinder valve assembly



FIG. 1 is a front perspective view of a fluid cylinder valve assembly according to our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in the figures indicate environment and form a part of the claimed design. 

CLAIM The ornamental design for a fluid cylinder valve assembly, as shown and described. 